Book between plants with supplement capsules

Knowledge blog > Micronutrient dictionary


Themen dieses Blogartikels:

Table of Contents

What is Methionine?

Methionine is an essential amino acid. This means that it must be ingested through food.

What are the functions of Methionine?

Methionine is a proteinogenic amino acid, i.e. it is required for the synthesis of proteins. Methionine is also a glucogenic amino acid that can be introduced into the citrate cycle for energy production. Methionine is part of the homocysteine metabolism, as SAM (S-adenosylmethionine), the most important methyl group donor, is formed from methionine. Methionine contains sulphur, which is why it is part of sulphur-containing proteins and can also form cysteine. Cysteine is an antioxidant and can be used for the synthesis of glutathione, among other things. Methionine is also involved in nucleotide production, which is why it is important for normal cell division.1

What makes Methionine unique?

Methionine contains sulphur, but this is not necessarily reactive as it occurs in the middle of the amino acid. The amino acid is also particularly important for the liver, as it could have an influence on detoxification as a precursor of cysteine and therefore glutathione2. In normal doses, methionine supports the homocysteine balance.3

How much Methionine do you need per day?

The German Nutrition Society (DGE) has not yet issued a recommendation on daily methionine intake. The requirement of an adult is probably around 10 to 20 mg methionine per kilogram of body weight per day - age, gender and individual state of health are decisive factors here. In children and adolescents, the requirement may be slightly higher due to growth. Pregnant women and breastfeeding mothers also need a little more of this essential amino acid.6

When do you need Methionine most?

In the case of urinary tract infections, methionine can inhibit the growth of some bacteria. Methionine is also particularly valued for its antioxidant properties and its involvement in methyl metabolism in the area of liver regeneration and stress.5

How does a Methionine deficiency develop and how does it manifest itself?

Methionine is found in many protein-containing foods, so a deficiency is rather rare. Nevertheless, there are certain groups of people who can develop a deficiency. These include, for example, people with frequent urinary tract infections: For them, the methionine stored in the body acidifies the urine, which increases the need for this nutrient. Allergy sufferers and people with liver disease should also make sure they have a sufficient supply. A methionine deficiency can lead to symptoms such as hair loss, water retention in the arms and legs and problems urinating.7

What happens if there is an overdose of Methionine?

If too much methionine is taken, homocysteine can be elevated and thus disrupt the balance of this metabolic pathway. Possible consequences can include vomiting, nausea, diarrhea, drowsiness and irritability8. Anyone who takes too much methionine over a longer period of time risks an imbalance in the mineral balance due to the uric acid effect, as more calcium is excreted.9

Which foods are particularly high in Lysine?

Salmon, shrimp, turkey, chicken and soy as well as nuts and wheat germ contain comparatively high levels of methionine. Methionine is often a problem among vegan protein sources, as it tends to be less abundant than other amino acids.

Further blog articles on the topic

What is glutamine, what function and effect does it have on your well-being?
Read article
Was ist Lysin, welche Funktion und Wirkung hat es auf dein Wohlbefinden?
Read article

What is Valine, what function and effect does it have on your well-being?

Read article

What is Tryptophane, what function and effect does it have on your well-being?

Read article

What is Threonine, what function and effect does it have on your well-being?

Read article

What is Phenylalanine, what function and effect does it have on your well-being?

Read article
Amino acid deficiency - what are the causes and symptoms?
As organic compounds, amino acids play an important role in the human body - but not all of them in the same way. In this article, you will not only find out exactly what amino acids are and what functions they perform, but also how you can recognize a deficiency and take targeted action against it.
Read article
Why are amino acids so important in sport?
Muscle building, performance & regeneration - amino acids are supposed to improve all of these things. Are they really that important in sport? And what are they for anyway? In this blog post, we explain what amino acids can do and why you can benefit from them as an athlete.
Read article
Why the protein shake is no longer enough - next level: amino acids
Proteins are among the most important building blocks of our cells. Proteins are macromolecules that are made up of amino acids. Here you can find out more about the optimal supply of amino acids and reasons why protein shakes alone are no longer enough.
Read article
More muscle mass through epigenetics & mitochondrial power
In this article, we'll dive deep into the science behind muscle building, including the latest findings in epigenetics and mitochondrial function.
Read article

This dictionary entry is based on carefully researched sources:

Bibliography & Sources